HornetQ 2.2.5.Final

HornetQ Core

org.hornetq.api.core	Core Messaging API.
org.hornetq.api.core.client	Core Client Messaging API.
org.hornetq.api.core.client.loadbalance	Client load-balancing API.
org.hornetq.api.core.management	Management API for HornetQ servers and its Core resources.

JMS

org.hornetq.api.jms	API to create HornetQ JMS resources.
org.hornetq.api.jms.management	Management API for HornetQ JMS resources.

HornetQ SPI

org.hornetq.spi.core.logging	Logging SPI.
org.hornetq.spi.core.naming
org.hornetq.spi.core.protocol
org.hornetq.spi.core.remoting	Remoting SPI.
org.hornetq.spi.core.security	Security SPI.